ATTINY20-MMHR Atmel, ATTINY20-MMHR Datasheet - Page 174

• Manufacturer Part Number: ATTINY20-MMHR
• Description: MCU AVR 2KB FLASH 12MHZ 20QFN
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY20-MMHR

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 12MHz
• Connectivity: I²C, SPI
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 12
• Program Memory Size: 2KB (1K x 16)
• Program Memory Type: FLASH
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

20.3
20.4
20.4.1
Table 20-2.
174
Calibration
Method
Factory
Calibration
User
Calibration
Speed
Clock Characteristics
ATtiny20
Accuracy of Calibrated Internal Oscillator
Calibration Accuracy of Internal RC Oscillator
Fixed frequency within:
Target Frequency
The maximum operating frequency of the device is dependent on supply voltage, V
tionship between supply voltage and maximum operating frequency is piecewise linear, as
shown in
4.5V.
Figure 20-1. Maximum Operating Frequency vs. Supply Voltage
It is possible to manually calibrate the internal oscillator to be more accurate than default factory
calibration. Note that the oscillator frequency depends on temperature and voltage. Voltage and
temperature characteristics can be found in
page
Notes:
7.3 – 8.1 MHz
8.0 MHz
207.
12 MHz
1. Accuracy of oscillator frequency at calibration point (fixed temperature and fixed voltage).
8 MHz
4 MHz
Figure
20-1, the Maximum Frequency vs. V
1.8V
Fixed voltage within:
1.8V – 5.5V
V
3V
CC
2.7V
Figure 21-53 on page 206
Fixed temp. within:
-40°C to +85°C
Temperature
25°C
CC
curve is linear between 1.8V < V
4.5V
Accuracy at given Voltage
& Temperature
and
5.5V
Figure 21-54 on
±10%
±1%
8235B–AVR–04/11
CC
. The rela-
(1)
CC
<